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四个对应材料内部物理过程的需求文档。加工硬化与晶粒演化涵盖越打越硬与回火软化;淬火退火相变涵盖温度区间与三阶段可视化;应力累积涵盖弯曲开裂;疲劳与耐久度涵盖刀具失效。 Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent) Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>